Stemar Long Test Balls are designed to be installed through a cleanout or floor drain and seal both sides of the wye for a sewer air test.

Molded sealing ribs at each end of the plug ensure a leak-free seal, and the top side of the plug will inflate before the bottom preventing possible backsplash during your waste stack test.

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Stemar Long Test Balls, manufactured by Cherne Industries, are proudly made in the USA with 100% natural rubber.